An early goal by Mansfield Town's Chris Clements means Newport County are trailing at the end of the first half. Newport's first attempt to secure a point was by Chris Zebroski with a right foot kick from outside the box.
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Gwent Police say the teenager has been released while they ''seek charging advice from the Crown Prosecution Service.''
The man has been charged with murder over the death of Frederic Pallade in Clydach on Wednesday.
Swansea twice came from behind to claim a dramatic 4-3 win at the Liberty Stadium against Rotherham.